BARBOSA, Osvaldo A.; ROGEL, José Alvarez.; BIANCO, Cesar A.; RAMIREZ, Francisco A.; FARAH, Marta A.
Resumen:
Due to the existence of complex space gradients and temporary of salinity and humidity
in the soils, the halophyte vegetation is presented in fringes. Our objective was to characterize the soils
and to explain the distribution of the vegetation of the nor-northeast sector of the city of Villa
Mercedes. The study sector is located to scarce 5 km of this (33º 37´ of south latitude and 65º 25´ of
west longitude) presenting a height of 505 msnm and understanding some 200 has. The soils of these
sectors were characterized and classified as saline-sodic. The results show that as you advance from
the “monte halófilo” (higher sector) toward the “playa salina” (lower area), the superficial salinity
increases and it diminishes the depth to the phreatic mantle. The analysis of the data of CE, Mg2+ and
Cl- it shows you differ statistically significant for physiognomic types and depth (p <0.05). The pH
and the K+ only show differences for the physiognomic types. In general, all the parameters diminish
from surface. Differ significant for depth they were opposing for CE, Mg2+, Na+, Cl-, and RAS. A
direct regression was obtained for Na+ with regard to Cl - and SO4
= (r2 = 0.9838). You conclude that
the zonation of the vegetation halophyte responds, at first, to the factors depth to the phreatic mantel
and salinity.
